A336270 - OEIS

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A336270 as a simple table

n	a(n)
0	1
1	3
2	15
3	381
4	67635
5	83118753
6	813824623689
7	58040410068847251
8	32150480245981639533315
9	154935057570894645075940703673
10	5474671509704049919709361235659936825
11	1600436120524545216094358662984789029130593831

[1,3,15,381,67635,83118753,813824623689, 58040410068847251,32150480245981639533315, 154935057570894645075940703673, 5474671509704049919709361235659936825, 1600436120524545216094358662984789029130593831]